To play devil's advocate here, parenting has a lot to do with that. A man's the sum of his experiences. I wouldn't be surprised if Noah's family are all superior dickheads too, who manage to remain socially functional by having been in slightly different circumstances.
For example, Miles becoming a cop either matured him or gave him a permanently satisfying outlet for ego.
Assuming that Noah's mother was the one raised on his grandpa's farm, she probably 'escaped' to civilisation to marry the Boeing dude. Her daughter probs married somebody else who's rich.
The other Antwiler bros are still in their parents' favor because they're Republican, so can always just leech off of them. Alternatively, they're like Miles and evolved past their upbringing whilst Noah alienated his parents and vice versa with their disagreements over his D&D love and being a Democrat.
I'm not trying to take responsibility off of him, but it's slightly incorrect to say he's always been what he is.